Commit | Line | Data |
---|---|---|
a0d0e21e | 1 | /* cop.h |
79072805 | 2 | * |
4bb101f2 | 3 | * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
acde74e1 | 4 | * 2000, 2001, 2002, 2003, 2004, 2005, 2006 by Larry Wall and others |
79072805 LW |
5 | * |
6 | * You may distribute under the terms of either the GNU General Public | |
7 | * License or the Artistic License, as specified in the README file. | |
8 | * | |
a3985cdc | 9 | * Control ops (cops) are one of the three ops OP_NEXTSTATE, OP_DBSTATE, |
3ffa1527 JH |
10 | * and OP_SETSTATE that (loosely speaking) are separate statements. |
11 | * They hold information important for lexical state and error reporting. | |
12 | * At run time, PL_curcop is set to point to the most recently executed cop, | |
a3985cdc | 13 | * and thus can be used to determine our current state. |
79072805 LW |
14 | */ |
15 | ||
0d2925a6 DM |
16 | /* A jmpenv packages the state required to perform a proper non-local jump. |
17 | * Note that there is a start_env initialized when perl starts, and top_env | |
18 | * points to this initially, so top_env should always be non-null. | |
19 | * | |
20 | * Existence of a non-null top_env->je_prev implies it is valid to call | |
21 | * longjmp() at that runlevel (we make sure start_env.je_prev is always | |
22 | * null to ensure this). | |
23 | * | |
24 | * je_mustcatch, when set at any runlevel to TRUE, means eval ops must | |
25 | * establish a local jmpenv to handle exception traps. Care must be taken | |
26 | * to restore the previous value of je_mustcatch before exiting the | |
27 | * stack frame iff JMPENV_PUSH was not called in that stack frame. | |
28 | * GSAR 97-03-27 | |
29 | */ | |
30 | ||
31 | struct jmpenv { | |
32 | struct jmpenv * je_prev; | |
33 | Sigjmp_buf je_buf; /* only for use if !je_throw */ | |
34 | int je_ret; /* last exception thrown */ | |
35 | bool je_mustcatch; /* need to call longjmp()? */ | |
36 | }; | |
37 | ||
38 | typedef struct jmpenv JMPENV; | |
39 | ||
40 | #ifdef OP_IN_REGISTER | |
41 | #define OP_REG_TO_MEM PL_opsave = op | |
42 | #define OP_MEM_TO_REG op = PL_opsave | |
43 | #else | |
44 | #define OP_REG_TO_MEM NOOP | |
45 | #define OP_MEM_TO_REG NOOP | |
46 | #endif | |
47 | ||
48 | /* | |
49 | * How to build the first jmpenv. | |
50 | * | |
51 | * top_env needs to be non-zero. It points to an area | |
52 | * in which longjmp() stuff is stored, as C callstack | |
53 | * info there at least is thread specific this has to | |
54 | * be per-thread. Otherwise a 'die' in a thread gives | |
55 | * that thread the C stack of last thread to do an eval {}! | |
56 | */ | |
57 | ||
58 | #define JMPENV_BOOTSTRAP \ | |
59 | STMT_START { \ | |
60 | Zero(&PL_start_env, 1, JMPENV); \ | |
61 | PL_start_env.je_ret = -1; \ | |
62 | PL_start_env.je_mustcatch = TRUE; \ | |
63 | PL_top_env = &PL_start_env; \ | |
64 | } STMT_END | |
65 | ||
66 | /* | |
67 | * PERL_FLEXIBLE_EXCEPTIONS | |
68 | * | |
69 | * All the flexible exceptions code has been removed. | |
70 | * See the following threads for details: | |
71 | * | |
72 | * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2004-07/msg00378.html | |
73 | * | |
74 | * Joshua's original patches (which weren't applied) and discussion: | |
75 | * | |
76 | * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01396.html | |
77 | * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01489.html | |
78 | * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01491.html | |
79 | * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01608.html | |
80 | * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg02144.html | |
81 | * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg02998.html | |
82 | * | |
83 | * Chip's reworked patch and discussion: | |
84 | * | |
85 | * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1999-03/msg00520.html | |
86 | * | |
87 | * The flaw in these patches (which went unnoticed at the time) was | |
88 | * that they moved some code that could potentially die() out of the | |
89 | * region protected by the setjmp()s. This caused exceptions within | |
90 | * END blocks and such to not be handled by the correct setjmp(). | |
91 | * | |
92 | * The original patches that introduces flexible exceptions were: | |
93 | * | |
94 | * http://public.activestate.com/cgi-bin/perlbrowse?patch=3386 | |
95 | * http://public.activestate.com/cgi-bin/perlbrowse?patch=5162 | |
96 | */ | |
97 | ||
98 | #define dJMPENV JMPENV cur_env | |
99 | ||
100 | #define JMPENV_PUSH(v) \ | |
101 | STMT_START { \ | |
102 | DEBUG_l(Perl_deb(aTHX_ "Setting up jumplevel %p, was %p\n", \ | |
ca0270c4 | 103 | (void*)&cur_env, (void*)PL_top_env)); \ |
0d2925a6 DM |
104 | cur_env.je_prev = PL_top_env; \ |
105 | OP_REG_TO_MEM; \ | |
106 | cur_env.je_ret = PerlProc_setjmp(cur_env.je_buf, SCOPE_SAVES_SIGNAL_MASK); \ | |
107 | OP_MEM_TO_REG; \ | |
108 | PL_top_env = &cur_env; \ | |
109 | cur_env.je_mustcatch = FALSE; \ | |
110 | (v) = cur_env.je_ret; \ | |
111 | } STMT_END | |
112 | ||
113 | #define JMPENV_POP \ | |
114 | STMT_START { \ | |
115 | DEBUG_l(Perl_deb(aTHX_ "popping jumplevel was %p, now %p\n", \ | |
ca0270c4 | 116 | (void*)PL_top_env, (void*)cur_env.je_prev)); \ |
0d2925a6 DM |
117 | PL_top_env = cur_env.je_prev; \ |
118 | } STMT_END | |
119 | ||
120 | #define JMPENV_JUMP(v) \ | |
121 | STMT_START { \ | |
122 | OP_REG_TO_MEM; \ | |
123 | if (PL_top_env->je_prev) \ | |
124 | PerlProc_longjmp(PL_top_env->je_buf, (v)); \ | |
125 | if ((v) == 2) \ | |
37038d91 | 126 | PerlProc_exit(STATUS_EXIT); \ |
0d2925a6 DM |
127 | PerlIO_printf(PerlIO_stderr(), "panic: top_env\n"); \ |
128 | PerlProc_exit(1); \ | |
129 | } STMT_END | |
130 | ||
131 | #define CATCH_GET (PL_top_env->je_mustcatch) | |
132 | #define CATCH_SET(v) (PL_top_env->je_mustcatch = (v)) | |
133 | ||
134 | ||
135 | ||
79072805 LW |
136 | struct cop { |
137 | BASEOP | |
a0d0e21e | 138 | char * cop_label; /* label for this construct */ |
57843af0 | 139 | #ifdef USE_ITHREADS |
11faa288 | 140 | char * cop_stashpv; /* package line was compiled in */ |
57843af0 GS |
141 | char * cop_file; /* file name the following line # is from */ |
142 | #else | |
11faa288 | 143 | HV * cop_stash; /* package line was compiled in */ |
79072805 | 144 | GV * cop_filegv; /* file the following line # is from */ |
57843af0 | 145 | #endif |
d5ec2987 | 146 | U32 cop_hints; /* hints bits from pragmata */ |
a0d0e21e | 147 | U32 cop_seq; /* parse sequence number */ |
79072805 | 148 | line_t cop_line; /* line # of this command */ |
72dc9ed5 NC |
149 | /* Beware. mg.c and warnings.pl assume the type of this is STRLEN *: */ |
150 | STRLEN * cop_warnings; /* lexical warnings bitmask */ | |
b3ca2e83 NC |
151 | /* compile time state of %^H. See the comment in op.c for how this is |
152 | used to recreate a hash to return from caller. */ | |
c28fe1ec | 153 | struct refcounted_he * cop_hints_hash; |
79072805 LW |
154 | }; |
155 | ||
57843af0 GS |
156 | #ifdef USE_ITHREADS |
157 | # define CopFILE(c) ((c)->cop_file) | |
158 | # define CopFILEGV(c) (CopFILE(c) \ | |
a0714e2c | 159 | ? gv_fetchfile(CopFILE(c)) : NULL) |
083fcd59 | 160 | |
7e4e8c89 NC |
161 | # ifdef NETWARE |
162 | # define CopFILE_set(c,pv) ((c)->cop_file = savepv(pv)) | |
163 | # else | |
164 | # define CopFILE_set(c,pv) ((c)->cop_file = savesharedpv(pv)) | |
165 | # endif | |
083fcd59 | 166 | |
57843af0 | 167 | # define CopFILESV(c) (CopFILE(c) \ |
a0714e2c | 168 | ? GvSV(gv_fetchfile(CopFILE(c))) : NULL) |
57843af0 | 169 | # define CopFILEAV(c) (CopFILE(c) \ |
7d49f689 | 170 | ? GvAV(gv_fetchfile(CopFILE(c))) : NULL) |
8688788e SH |
171 | # ifdef DEBUGGING |
172 | # define CopFILEAVx(c) (assert(CopFILE(c)), \ | |
36c7798d | 173 | GvAV(gv_fetchfile(CopFILE(c)))) |
8688788e SH |
174 | # else |
175 | # define CopFILEAVx(c) (GvAV(gv_fetchfile(CopFILE(c)))) | |
176 | # endif | |
57843af0 | 177 | # define CopSTASHPV(c) ((c)->cop_stashpv) |
083fcd59 | 178 | |
7e4e8c89 | 179 | # ifdef NETWARE |
bd61b366 | 180 | # define CopSTASHPV_set(c,pv) ((c)->cop_stashpv = ((pv) ? savepv(pv) : NULL)) |
7e4e8c89 NC |
181 | # else |
182 | # define CopSTASHPV_set(c,pv) ((c)->cop_stashpv = savesharedpv(pv)) | |
183 | # endif | |
083fcd59 | 184 | |
11faa288 | 185 | # define CopSTASH(c) (CopSTASHPV(c) \ |
5c284bb0 | 186 | ? gv_stashpv(CopSTASHPV(c),GV_ADD) : NULL) |
bd61b366 | 187 | # define CopSTASH_set(c,hv) CopSTASHPV_set(c, (hv) ? HvNAME_get(hv) : NULL) |
ed221c57 | 188 | # define CopSTASH_eq(c,hv) ((hv) && stashpv_hvname_match(c,hv)) |
6a3d5e3d | 189 | # define CopLABEL(c) ((c)->cop_label) |
63031daf | 190 | # define CopLABEL_set(c,pv) (CopLABEL(c) = (pv)) |
7e4e8c89 NC |
191 | # ifdef NETWARE |
192 | # define CopSTASH_free(c) SAVECOPSTASH_FREE(c) | |
7e4e8c89 | 193 | # define CopFILE_free(c) SAVECOPFILE_FREE(c) |
6a3d5e3d | 194 | # define CopLABEL_free(c) SAVECOPLABEL_FREE(c) |
63031daf | 195 | # define CopLABEL_alloc(pv) ((pv)?savepv(pv):NULL) |
7e4e8c89 | 196 | # else |
ed221c57 | 197 | # define CopSTASH_free(c) PerlMemShared_free(CopSTASHPV(c)) |
bd61b366 | 198 | # define CopFILE_free(c) (PerlMemShared_free(CopFILE(c)),(CopFILE(c) = NULL)) |
6a3d5e3d | 199 | # define CopLABEL_free(c) (PerlMemShared_free(CopLABEL(c)),(CopLABEL(c) = NULL)) |
63031daf | 200 | # define CopLABEL_alloc(pv) ((pv)?savesharedpv(pv):NULL) |
7e4e8c89 | 201 | # endif |
57843af0 GS |
202 | #else |
203 | # define CopFILEGV(c) ((c)->cop_filegv) | |
f4dd75d9 GS |
204 | # define CopFILEGV_set(c,gv) ((c)->cop_filegv = (GV*)SvREFCNT_inc(gv)) |
205 | # define CopFILE_set(c,pv) CopFILEGV_set((c), gv_fetchfile(pv)) | |
a0714e2c | 206 | # define CopFILESV(c) (CopFILEGV(c) ? GvSV(CopFILEGV(c)) : NULL) |
7d49f689 | 207 | # define CopFILEAV(c) (CopFILEGV(c) ? GvAV(CopFILEGV(c)) : NULL) |
8688788e SH |
208 | # ifdef DEBUGGING |
209 | # define CopFILEAVx(c) (assert(CopFILEGV(c)), GvAV(CopFILEGV(c))) | |
210 | # else | |
211 | # define CopFILEAVx(c) (GvAV(CopFILEGV(c))) | |
212 | # endif | |
bd61b366 | 213 | # define CopFILE(c) (CopFILESV(c) ? SvPVX(CopFILESV(c)) : NULL) |
57843af0 | 214 | # define CopSTASH(c) ((c)->cop_stash) |
6a3d5e3d | 215 | # define CopLABEL(c) ((c)->cop_label) |
f4dd75d9 | 216 | # define CopSTASH_set(c,hv) ((c)->cop_stash = (hv)) |
bd61b366 | 217 | # define CopSTASHPV(c) (CopSTASH(c) ? HvNAME_get(CopSTASH(c)) : NULL) |
f4dd75d9 GS |
218 | /* cop_stash is not refcounted */ |
219 | # define CopSTASHPV_set(c,pv) CopSTASH_set((c), gv_stashpv(pv,GV_ADD)) | |
220 | # define CopSTASH_eq(c,hv) (CopSTASH(c) == (hv)) | |
63031daf | 221 | # define CopLABEL_alloc(pv) ((pv)?savepv(pv):NULL) |
6a3d5e3d | 222 | # define CopLABEL_set(c,pv) (CopLABEL(c) = (pv)) |
05ec9bb3 | 223 | # define CopSTASH_free(c) |
a0714e2c | 224 | # define CopFILE_free(c) (SvREFCNT_dec(CopFILEGV(c)),(CopFILEGV(c) = NULL)) |
63031daf | 225 | # define CopLABEL_free(c) (Safefree(CopLABEL(c)),(CopLABEL(c) = NULL)) |
05ec9bb3 | 226 | |
57843af0 GS |
227 | #endif /* USE_ITHREADS */ |
228 | ||
ed094faf | 229 | #define CopSTASH_ne(c,hv) (!CopSTASH_eq(c,hv)) |
cc49e20b | 230 | #define CopLINE(c) ((c)->cop_line) |
57843af0 GS |
231 | #define CopLINE_inc(c) (++CopLINE(c)) |
232 | #define CopLINE_dec(c) (--CopLINE(c)) | |
233 | #define CopLINE_set(c,l) (CopLINE(c) = (l)) | |
cc49e20b | 234 | |
248c2a4d CN |
235 | /* OutCopFILE() is CopFILE for output (caller, die, warn, etc.) */ |
236 | #ifdef MACOS_TRADITIONAL | |
237 | # define OutCopFILE(c) MacPerl_MPWFileName(CopFILE(c)) | |
238 | #else | |
239 | # define OutCopFILE(c) CopFILE(c) | |
240 | #endif | |
241 | ||
7b0bddfa NC |
242 | /* If $[ is non-zero, it's stored in cop_hints under the key "$[", and |
243 | HINT_ARYBASE is set to indicate this. | |
244 | Setting it is ineficient due to the need to create 2 mortal SVs, but as | |
245 | using $[ is highly discouraged, no sane Perl code will be using it. */ | |
246 | #define CopARYBASE_get(c) \ | |
247 | ((CopHINTS_get(c) & HINT_ARYBASE) \ | |
c28fe1ec NC |
248 | ? SvIV(Perl_refcounted_he_fetch(aTHX_ (c)->cop_hints_hash, 0, \ |
249 | "$[", 2, 0, 0)) \ | |
7b0bddfa NC |
250 | : 0) |
251 | #define CopARYBASE_set(c, b) STMT_START { \ | |
d5ec2987 NC |
252 | if (b || ((c)->cop_hints & HINT_ARYBASE)) { \ |
253 | (c)->cop_hints |= HINT_ARYBASE; \ | |
7b0bddfa NC |
254 | if ((c) == &PL_compiling) \ |
255 | PL_hints |= HINT_LOCALIZE_HH | HINT_ARYBASE; \ | |
c28fe1ec NC |
256 | (c)->cop_hints_hash \ |
257 | = Perl_refcounted_he_new(aTHX_ (c)->cop_hints_hash, \ | |
7b0bddfa NC |
258 | sv_2mortal(newSVpvs("$[")), \ |
259 | sv_2mortal(newSViv(b))); \ | |
260 | } \ | |
261 | } STMT_END | |
fc15ae8f | 262 | |
623e6609 | 263 | /* FIXME NATIVE_HINTS if this is changed from op_private (see perl.h) */ |
d5ec2987 | 264 | #define CopHINTS_get(c) ((c)->cop_hints + 0) |
623e6609 | 265 | #define CopHINTS_set(c, h) STMT_START { \ |
d5ec2987 | 266 | (c)->cop_hints = (h); \ |
623e6609 NC |
267 | } STMT_END |
268 | ||
79072805 LW |
269 | /* |
270 | * Here we have some enormously heavy (or at least ponderous) wizardry. | |
271 | */ | |
272 | ||
273 | /* subroutine context */ | |
274 | struct block_sub { | |
275 | CV * cv; | |
276 | GV * gv; | |
463ee0b2 | 277 | GV * dfoutgv; |
79072805 LW |
278 | AV * savearray; |
279 | AV * argarray; | |
bb172083 | 280 | I32 olddepth; |
cc8d50a7 NC |
281 | U8 hasargs; |
282 | U8 lval; /* XXX merge lval and hasargs? */ | |
f3548bdc | 283 | PAD *oldcomppad; |
f39bc417 | 284 | OP * retop; /* op to execute on exit from sub */ |
79072805 LW |
285 | }; |
286 | ||
b36bdeca DM |
287 | /* base for the next two macros. Don't use directly. |
288 | * Note that the refcnt of the cv is incremented twice; The CX one is | |
289 | * decremented by LEAVESUB, the other by LEAVE. */ | |
290 | ||
ee98a1d6 | 291 | #define PUSHSUB_BASE(cx) \ |
79072805 | 292 | cx->blk_sub.cv = cv; \ |
b8f55b69 | 293 | cx->blk_sub.olddepth = CvDEPTH(cv); \ |
cc8d50a7 | 294 | cx->blk_sub.hasargs = hasargs; \ |
5f66b61c | 295 | cx->blk_sub.retop = NULL; \ |
b36bdeca | 296 | if (!CvDEPTH(cv)) { \ |
74c765eb AL |
297 | SvREFCNT_inc_simple_void_NN(cv); \ |
298 | SvREFCNT_inc_simple_void_NN(cv); \ | |
b36bdeca DM |
299 | SAVEFREESV(cv); \ |
300 | } | |
301 | ||
ee98a1d6 DM |
302 | |
303 | #define PUSHSUB(cx) \ | |
304 | PUSHSUB_BASE(cx) \ | |
cc8d50a7 NC |
305 | cx->blk_sub.lval = PL_op->op_private & \ |
306 | (OPpLVAL_INTRO|OPpENTERSUB_INARGS); | |
79072805 | 307 | |
ee98a1d6 DM |
308 | /* variant for use by OP_DBSTATE, where op_private holds hint bits */ |
309 | #define PUSHSUB_DB(cx) \ | |
310 | PUSHSUB_BASE(cx) \ | |
cc8d50a7 | 311 | cx->blk_sub.lval = 0; |
ee98a1d6 DM |
312 | |
313 | ||
79072805 LW |
314 | #define PUSHFORMAT(cx) \ |
315 | cx->blk_sub.cv = cv; \ | |
316 | cx->blk_sub.gv = gv; \ | |
5f66b61c | 317 | cx->blk_sub.retop = NULL; \ |
cc8d50a7 | 318 | cx->blk_sub.hasargs = 0; \ |
3280af22 | 319 | cx->blk_sub.dfoutgv = PL_defoutgv; \ |
b37c2d43 | 320 | SvREFCNT_inc_void(cx->blk_sub.dfoutgv) |
79072805 | 321 | |
3db8f154 | 322 | #define POP_SAVEARRAY() \ |
6d4ff0d2 | 323 | STMT_START { \ |
3280af22 | 324 | SvREFCNT_dec(GvAV(PL_defgv)); \ |
a8bba7fa | 325 | GvAV(PL_defgv) = cx->blk_sub.savearray; \ |
6d4ff0d2 | 326 | } STMT_END |
6d4ff0d2 | 327 | |
ecf8e9dd | 328 | /* junk in @_ spells trouble when cloning CVs and in pp_caller(), so don't |
8e09340b GS |
329 | * leave any (a fast av_clear(ary), basically) */ |
330 | #define CLEAR_ARGARRAY(ary) \ | |
331 | STMT_START { \ | |
332 | AvMAX(ary) += AvARRAY(ary) - AvALLOC(ary); \ | |
9c6bc640 | 333 | AvARRAY(ary) = AvALLOC(ary); \ |
8e09340b GS |
334 | AvFILLp(ary) = -1; \ |
335 | } STMT_END | |
7766f137 | 336 | |
b0d9ce38 GS |
337 | #define POPSUB(cx,sv) \ |
338 | STMT_START { \ | |
cc8d50a7 | 339 | if (cx->blk_sub.hasargs) { \ |
7766f137 | 340 | POP_SAVEARRAY(); \ |
d8b46c1b | 341 | /* abandon @_ if it got reified */ \ |
a8bba7fa | 342 | if (AvREAL(cx->blk_sub.argarray)) { \ |
e2d306cb | 343 | const SSize_t fill = AvFILLp(cx->blk_sub.argarray); \ |
a8bba7fa GS |
344 | SvREFCNT_dec(cx->blk_sub.argarray); \ |
345 | cx->blk_sub.argarray = newAV(); \ | |
346 | av_extend(cx->blk_sub.argarray, fill); \ | |
11ca45c0 | 347 | AvREIFY_only(cx->blk_sub.argarray); \ |
dd2155a4 | 348 | CX_CURPAD_SV(cx->blk_sub, 0) = (SV*)cx->blk_sub.argarray; \ |
d8b46c1b | 349 | } \ |
7766f137 | 350 | else { \ |
8e09340b | 351 | CLEAR_ARGARRAY(cx->blk_sub.argarray); \ |
7766f137 | 352 | } \ |
79072805 | 353 | } \ |
b0d9ce38 GS |
354 | sv = (SV*)cx->blk_sub.cv; \ |
355 | if (sv && (CvDEPTH((CV*)sv) = cx->blk_sub.olddepth)) \ | |
a0714e2c | 356 | sv = NULL; \ |
b0d9ce38 GS |
357 | } STMT_END |
358 | ||
359 | #define LEAVESUB(sv) \ | |
360 | STMT_START { \ | |
361 | if (sv) \ | |
362 | SvREFCNT_dec(sv); \ | |
363 | } STMT_END | |
79072805 LW |
364 | |
365 | #define POPFORMAT(cx) \ | |
4633a7c4 LW |
366 | setdefout(cx->blk_sub.dfoutgv); \ |
367 | SvREFCNT_dec(cx->blk_sub.dfoutgv); | |
79072805 LW |
368 | |
369 | /* eval context */ | |
370 | struct block_eval { | |
31a3f62b NC |
371 | U8 old_in_eval; |
372 | U16 old_op_type; | |
0f79a09d | 373 | SV * old_namesv; |
79072805 | 374 | OP * old_eval_root; |
748a9306 | 375 | SV * cur_text; |
2090ab20 | 376 | CV * cv; |
f39bc417 | 377 | OP * retop; /* op to execute on exit from eval */ |
abd70938 | 378 | JMPENV * cur_top_env; /* value of PL_top_env when eval CX created */ |
79072805 LW |
379 | }; |
380 | ||
8990e307 | 381 | #define PUSHEVAL(cx,n,fgv) \ |
0f79a09d | 382 | STMT_START { \ |
3280af22 | 383 | cx->blk_eval.old_in_eval = PL_in_eval; \ |
a8bba7fa | 384 | cx->blk_eval.old_op_type = PL_op->op_type; \ |
a0714e2c | 385 | cx->blk_eval.old_namesv = (n ? newSVpv(n,0) : NULL); \ |
a8bba7fa | 386 | cx->blk_eval.old_eval_root = PL_eval_root; \ |
0f79a09d | 387 | cx->blk_eval.cur_text = PL_linestr; \ |
601f1833 | 388 | cx->blk_eval.cv = NULL; /* set by doeval(), as applicable */ \ |
5f66b61c | 389 | cx->blk_eval.retop = NULL; \ |
abd70938 | 390 | cx->blk_eval.cur_top_env = PL_top_env; \ |
0f79a09d | 391 | } STMT_END |
79072805 LW |
392 | |
393 | #define POPEVAL(cx) \ | |
0f79a09d | 394 | STMT_START { \ |
3280af22 | 395 | PL_in_eval = cx->blk_eval.old_in_eval; \ |
79072805 | 396 | optype = cx->blk_eval.old_op_type; \ |
7766f137 | 397 | PL_eval_root = cx->blk_eval.old_eval_root; \ |
0f79a09d GS |
398 | if (cx->blk_eval.old_namesv) \ |
399 | sv_2mortal(cx->blk_eval.old_namesv); \ | |
400 | } STMT_END | |
79072805 LW |
401 | |
402 | /* loop context */ | |
403 | struct block_loop { | |
404 | char * label; | |
405 | I32 resetsp; | |
022eaa24 NC |
406 | LOOP * my_op; /* My op, that contains redo, next and last ops. */ |
407 | /* (except for non_ithreads we need to modify next_op in pp_ctl.c, hence | |
408 | why next_op is conditionally defined below.) */ | |
7766f137 GS |
409 | #ifdef USE_ITHREADS |
410 | void * iterdata; | |
f3548bdc | 411 | PAD *oldcomppad; |
7766f137 | 412 | #else |
022eaa24 | 413 | OP * next_op; |
79072805 | 414 | SV ** itervar; |
7766f137 | 415 | #endif |
79072805 | 416 | SV * itersave; |
0a498629 NC |
417 | /* (from inspection of source code) for a .. range of strings this is the |
418 | current string. */ | |
5f05dabc | 419 | SV * iterlval; |
0a498629 NC |
420 | /* (from inspection of source code) for a foreach loop this is the array |
421 | being iterated over. For a .. range of numbers it's the current value. | |
422 | A check is often made on the SvTYPE of iterary to determine whether | |
423 | we are iterating over an array or a range. (numbers or strings) */ | |
79072805 | 424 | AV * iterary; |
89ea2908 | 425 | IV iterix; |
0a498629 NC |
426 | /* (from inspection of source code) for a .. range of numbers this is the |
427 | maximum value. */ | |
89ea2908 | 428 | IV itermax; |
79072805 | 429 | }; |
0a498629 NC |
430 | /* It might be possible to squeeze this structure further. As best I can tell |
431 | itermax and iterlval are never used at the same time, so it might be possible | |
432 | to make them into a union. However, I'm not confident that there are enough | |
433 | flag bits/NULLable pointers in this structure alone to encode which is | |
434 | active. There is, however, U8 of space free in struct block, which could be | |
435 | used. Right now it may not be worth squeezing this structure further, as it's | |
436 | the largest part of struct block, and currently struct block is 64 bytes on | |
437 | an ILP32 system, which will give good cache alignment. | |
438 | */ | |
79072805 | 439 | |
7766f137 GS |
440 | #ifdef USE_ITHREADS |
441 | # define CxITERVAR(c) \ | |
442 | ((c)->blk_loop.iterdata \ | |
443 | ? (CxPADLOOP(cx) \ | |
dd2155a4 DM |
444 | ? &CX_CURPAD_SV( (c)->blk_loop, \ |
445 | INT2PTR(PADOFFSET, (c)->blk_loop.iterdata)) \ | |
7766f137 GS |
446 | : &GvSV((GV*)(c)->blk_loop.iterdata)) \ |
447 | : (SV**)NULL) | |
448 | # define CX_ITERDATA_SET(cx,idata) \ | |
dd2155a4 | 449 | CX_CURPAD_SAVE(cx->blk_loop); \ |
155aba94 | 450 | if ((cx->blk_loop.iterdata = (idata))) \ |
d10edb75 KC |
451 | cx->blk_loop.itersave = SvREFCNT_inc(*CxITERVAR(cx)); \ |
452 | else \ | |
a0714e2c | 453 | cx->blk_loop.itersave = NULL; |
7766f137 GS |
454 | #else |
455 | # define CxITERVAR(c) ((c)->blk_loop.itervar) | |
456 | # define CX_ITERDATA_SET(cx,ivar) \ | |
155aba94 | 457 | if ((cx->blk_loop.itervar = (SV**)(ivar))) \ |
d10edb75 KC |
458 | cx->blk_loop.itersave = SvREFCNT_inc(*CxITERVAR(cx)); \ |
459 | else \ | |
a0714e2c | 460 | cx->blk_loop.itersave = NULL; |
7766f137 GS |
461 | #endif |
462 | ||
022eaa24 NC |
463 | #ifdef USE_ITHREADS |
464 | # define PUSHLOOP_OP_NEXT /* No need to do anything. */ | |
465 | # define CX_LOOP_NEXTOP_GET(cx) ((cx)->blk_loop.my_op->op_nextop + 0) | |
466 | #else | |
467 | # define PUSHLOOP_OP_NEXT cx->blk_loop.next_op = cLOOP->op_nextop | |
468 | # define CX_LOOP_NEXTOP_GET(cx) ((cx)->blk_loop.next_op + 0) | |
469 | #endif | |
470 | ||
7766f137 | 471 | #define PUSHLOOP(cx, dat, s) \ |
38a230cb GS |
472 | cx->blk_loop.label = PL_curcop->cop_label; \ |
473 | cx->blk_loop.resetsp = s - PL_stack_base; \ | |
022eaa24 NC |
474 | cx->blk_loop.my_op = cLOOP; \ |
475 | PUSHLOOP_OP_NEXT; \ | |
a0714e2c | 476 | cx->blk_loop.iterlval = NULL; \ |
7d49f689 | 477 | cx->blk_loop.iterary = NULL; \ |
7766f137 GS |
478 | cx->blk_loop.iterix = -1; \ |
479 | CX_ITERDATA_SET(cx,dat); | |
79072805 LW |
480 | |
481 | #define POPLOOP(cx) \ | |
a8bba7fa | 482 | SvREFCNT_dec(cx->blk_loop.iterlval); \ |
7766f137 | 483 | if (CxITERVAR(cx)) { \ |
21401c75 | 484 | if (SvPADMY(cx->blk_loop.itersave)) { \ |
d4c19fe8 | 485 | SV ** const s_v_p = CxITERVAR(cx); \ |
21401c75 CH |
486 | sv_2mortal(*s_v_p); \ |
487 | *s_v_p = cx->blk_loop.itersave; \ | |
488 | } \ | |
489 | else { \ | |
490 | SvREFCNT_dec(cx->blk_loop.itersave); \ | |
491 | } \ | |
44a8e56a | 492 | } \ |
a8bba7fa GS |
493 | if (cx->blk_loop.iterary && cx->blk_loop.iterary != PL_curstack)\ |
494 | SvREFCNT_dec(cx->blk_loop.iterary); | |
79072805 | 495 | |
0d863452 RH |
496 | /* given/when context */ |
497 | struct block_givwhen { | |
498 | OP *leave_op; | |
499 | }; | |
500 | ||
501 | #define PUSHGIVEN(cx) \ | |
502 | cx->blk_givwhen.leave_op = cLOGOP->op_other; | |
503 | ||
504 | #define PUSHWHEN PUSHGIVEN | |
505 | ||
79072805 LW |
506 | /* context common to subroutines, evals and loops */ |
507 | struct block { | |
2e0df0e8 NC |
508 | U16 blku_type; /* what kind of context this is */ |
509 | U8 blku_gimme; /* is this block running in list context? */ | |
1be1929d | 510 | U8 blku_spare; /* Padding to match with struct subst */ |
79072805 LW |
511 | I32 blku_oldsp; /* stack pointer to copy stuff down to */ |
512 | COP * blku_oldcop; /* old curcop pointer */ | |
79072805 LW |
513 | I32 blku_oldmarksp; /* mark stack index */ |
514 | I32 blku_oldscopesp; /* scope stack index */ | |
515 | PMOP * blku_oldpm; /* values of pattern match vars */ | |
79072805 LW |
516 | |
517 | union { | |
518 | struct block_sub blku_sub; | |
519 | struct block_eval blku_eval; | |
520 | struct block_loop blku_loop; | |
0d863452 | 521 | struct block_givwhen blku_givwhen; |
79072805 LW |
522 | } blk_u; |
523 | }; | |
524 | #define blk_oldsp cx_u.cx_blk.blku_oldsp | |
525 | #define blk_oldcop cx_u.cx_blk.blku_oldcop | |
79072805 LW |
526 | #define blk_oldmarksp cx_u.cx_blk.blku_oldmarksp |
527 | #define blk_oldscopesp cx_u.cx_blk.blku_oldscopesp | |
528 | #define blk_oldpm cx_u.cx_blk.blku_oldpm | |
529 | #define blk_gimme cx_u.cx_blk.blku_gimme | |
530 | #define blk_sub cx_u.cx_blk.blk_u.blku_sub | |
531 | #define blk_eval cx_u.cx_blk.blk_u.blku_eval | |
532 | #define blk_loop cx_u.cx_blk.blk_u.blku_loop | |
0d863452 | 533 | #define blk_givwhen cx_u.cx_blk.blk_u.blku_givwhen |
79072805 LW |
534 | |
535 | /* Enter a block. */ | |
8990e307 | 536 | #define PUSHBLOCK(cx,t,sp) CXINC, cx = &cxstack[cxstack_ix], \ |
79072805 | 537 | cx->cx_type = t, \ |
3280af22 NIS |
538 | cx->blk_oldsp = sp - PL_stack_base, \ |
539 | cx->blk_oldcop = PL_curcop, \ | |
1aff0e91 | 540 | cx->blk_oldmarksp = PL_markstack_ptr - PL_markstack, \ |
3280af22 | 541 | cx->blk_oldscopesp = PL_scopestack_ix, \ |
3280af22 | 542 | cx->blk_oldpm = PL_curpm, \ |
eb160463 | 543 | cx->blk_gimme = (U8)gimme; \ |
bf49b057 | 544 | DEBUG_l( PerlIO_printf(Perl_debug_log, "Entering block %ld, type %s\n", \ |
1aff0e91 | 545 | (long)cxstack_ix, PL_block_type[CxTYPE(cx)]); ) |
79072805 LW |
546 | |
547 | /* Exit a block (RETURN and LAST). */ | |
a0d0e21e | 548 | #define POPBLOCK(cx,pm) cx = &cxstack[cxstack_ix--], \ |
1aff0e91 | 549 | newsp = PL_stack_base + cx->blk_oldsp, \ |
3280af22 NIS |
550 | PL_curcop = cx->blk_oldcop, \ |
551 | PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \ | |
552 | PL_scopestack_ix = cx->blk_oldscopesp, \ | |
3280af22 NIS |
553 | pm = cx->blk_oldpm, \ |
554 | gimme = cx->blk_gimme; \ | |
b4ab917c | 555 | DEBUG_SCOPE("POPBLOCK"); \ |
bf49b057 | 556 | DEBUG_l( PerlIO_printf(Perl_debug_log, "Leaving block %ld, type %s\n", \ |
22c35a8c | 557 | (long)cxstack_ix+1,PL_block_type[CxTYPE(cx)]); ) |
79072805 LW |
558 | |
559 | /* Continue a block elsewhere (NEXT and REDO). */ | |
3280af22 | 560 | #define TOPBLOCK(cx) cx = &cxstack[cxstack_ix], \ |
1aff0e91 | 561 | PL_stack_sp = PL_stack_base + cx->blk_oldsp, \ |
3280af22 NIS |
562 | PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \ |
563 | PL_scopestack_ix = cx->blk_oldscopesp, \ | |
b4ab917c DM |
564 | PL_curpm = cx->blk_oldpm; \ |
565 | DEBUG_SCOPE("TOPBLOCK"); | |
79072805 LW |
566 | |
567 | /* substitution context */ | |
568 | struct subst { | |
2e0df0e8 | 569 | U16 sbu_type; /* what kind of context this is */ |
1be1929d NC |
570 | U8 sbu_once; /* Actually both booleans, but U8 to matches */ |
571 | U8 sbu_rxtainted; /* struct block */ | |
79072805 LW |
572 | I32 sbu_iters; |
573 | I32 sbu_maxiters; | |
22e551b9 | 574 | I32 sbu_rflags; |
4633a7c4 | 575 | I32 sbu_oldsave; |
79072805 LW |
576 | char * sbu_orig; |
577 | SV * sbu_dstr; | |
578 | SV * sbu_targ; | |
579 | char * sbu_s; | |
580 | char * sbu_m; | |
581 | char * sbu_strend; | |
c90c0ff4 | 582 | void * sbu_rxres; |
c07a80fd | 583 | REGEXP * sbu_rx; |
79072805 LW |
584 | }; |
585 | #define sb_iters cx_u.cx_subst.sbu_iters | |
586 | #define sb_maxiters cx_u.cx_subst.sbu_maxiters | |
22e551b9 | 587 | #define sb_rflags cx_u.cx_subst.sbu_rflags |
4633a7c4 | 588 | #define sb_oldsave cx_u.cx_subst.sbu_oldsave |
71be2cbc | 589 | #define sb_once cx_u.cx_subst.sbu_once |
590 | #define sb_rxtainted cx_u.cx_subst.sbu_rxtainted | |
79072805 LW |
591 | #define sb_orig cx_u.cx_subst.sbu_orig |
592 | #define sb_dstr cx_u.cx_subst.sbu_dstr | |
593 | #define sb_targ cx_u.cx_subst.sbu_targ | |
594 | #define sb_s cx_u.cx_subst.sbu_s | |
595 | #define sb_m cx_u.cx_subst.sbu_m | |
596 | #define sb_strend cx_u.cx_subst.sbu_strend | |
c90c0ff4 | 597 | #define sb_rxres cx_u.cx_subst.sbu_rxres |
c07a80fd | 598 | #define sb_rx cx_u.cx_subst.sbu_rx |
79072805 LW |
599 | |
600 | #define PUSHSUBST(cx) CXINC, cx = &cxstack[cxstack_ix], \ | |
601 | cx->sb_iters = iters, \ | |
602 | cx->sb_maxiters = maxiters, \ | |
22e551b9 | 603 | cx->sb_rflags = r_flags, \ |
4633a7c4 | 604 | cx->sb_oldsave = oldsave, \ |
71be2cbc | 605 | cx->sb_once = once, \ |
606 | cx->sb_rxtainted = rxtainted, \ | |
79072805 LW |
607 | cx->sb_orig = orig, \ |
608 | cx->sb_dstr = dstr, \ | |
609 | cx->sb_targ = targ, \ | |
610 | cx->sb_s = s, \ | |
611 | cx->sb_m = m, \ | |
612 | cx->sb_strend = strend, \ | |
4608196e | 613 | cx->sb_rxres = NULL, \ |
c07a80fd | 614 | cx->sb_rx = rx, \ |
c90c0ff4 | 615 | cx->cx_type = CXt_SUBST; \ |
e22ae1e2 | 616 | rxres_save(&cx->sb_rxres, rx); \ |
b69b0499 | 617 | (void)ReREFCNT_inc(rx) |
79072805 | 618 | |
c90c0ff4 | 619 | #define POPSUBST(cx) cx = &cxstack[cxstack_ix--]; \ |
e22ae1e2 DM |
620 | rxres_free(&cx->sb_rxres); \ |
621 | ReREFCNT_dec(cx->sb_rx) | |
79072805 LW |
622 | |
623 | struct context { | |
79072805 LW |
624 | union { |
625 | struct block cx_blk; | |
626 | struct subst cx_subst; | |
627 | } cx_u; | |
628 | }; | |
2e0df0e8 | 629 | #define cx_type cx_u.cx_subst.sbu_type |
6b35e009 GS |
630 | |
631 | #define CXTYPEMASK 0xff | |
79072805 LW |
632 | #define CXt_NULL 0 |
633 | #define CXt_SUB 1 | |
634 | #define CXt_EVAL 2 | |
635 | #define CXt_LOOP 3 | |
636 | #define CXt_SUBST 4 | |
637 | #define CXt_BLOCK 5 | |
7766f137 | 638 | #define CXt_FORMAT 6 |
0d863452 RH |
639 | #define CXt_GIVEN 7 |
640 | #define CXt_WHEN 8 | |
79072805 | 641 | |
9850bf21 RH |
642 | /* private flags for CXt_SUB and CXt_NULL */ |
643 | #define CXp_MULTICALL 0x00000400 /* part of a multicall (so don't | |
644 | tear down context on exit). */ | |
645 | ||
6b35e009 GS |
646 | /* private flags for CXt_EVAL */ |
647 | #define CXp_REAL 0x00000100 /* truly eval'', not a lookalike */ | |
1d76a5c3 | 648 | #define CXp_TRYBLOCK 0x00000200 /* eval{}, not eval'' or similar */ |
6b35e009 | 649 | |
7766f137 | 650 | /* private flags for CXt_LOOP */ |
0d863452 RH |
651 | #define CXp_FOREACH 0x00000200 /* a foreach loop */ |
652 | #define CXp_FOR_DEF 0x00000400 /* foreach using $_ */ | |
653 | #ifdef USE_ITHREADS | |
7766f137 GS |
654 | # define CXp_PADVAR 0x00000100 /* itervar lives on pad, iterdata |
655 | has pad offset; if not set, | |
656 | iterdata holds GV* */ | |
657 | # define CxPADLOOP(c) (((c)->cx_type & (CXt_LOOP|CXp_PADVAR)) \ | |
658 | == (CXt_LOOP|CXp_PADVAR)) | |
659 | #endif | |
660 | ||
6b35e009 | 661 | #define CxTYPE(c) ((c)->cx_type & CXTYPEMASK) |
9850bf21 RH |
662 | #define CxMULTICALL(c) (((c)->cx_type & CXp_MULTICALL) \ |
663 | == CXp_MULTICALL) | |
7766f137 GS |
664 | #define CxREALEVAL(c) (((c)->cx_type & (CXt_EVAL|CXp_REAL)) \ |
665 | == (CXt_EVAL|CXp_REAL)) | |
1d76a5c3 GS |
666 | #define CxTRYBLOCK(c) (((c)->cx_type & (CXt_EVAL|CXp_TRYBLOCK)) \ |
667 | == (CXt_EVAL|CXp_TRYBLOCK)) | |
0d863452 RH |
668 | #define CxFOREACH(c) (((c)->cx_type & (CXt_LOOP|CXp_FOREACH)) \ |
669 | == (CXt_LOOP|CXp_FOREACH)) | |
670 | #define CxFOREACHDEF(c) (((c)->cx_type & (CXt_LOOP|CXp_FOREACH|CXp_FOR_DEF))\ | |
671 | == (CXt_LOOP|CXp_FOREACH|CXp_FOR_DEF)) | |
6b35e009 | 672 | |
79072805 LW |
673 | #define CXINC (cxstack_ix < cxstack_max ? ++cxstack_ix : (cxstack_ix = cxinc())) |
674 | ||
ccfc67b7 JH |
675 | /* |
676 | =head1 "Gimme" Values | |
677 | */ | |
954c1994 GS |
678 | |
679 | /* | |
680 | =for apidoc AmU||G_SCALAR | |
681 | Used to indicate scalar context. See C<GIMME_V>, C<GIMME>, and | |
682 | L<perlcall>. | |
683 | ||
684 | =for apidoc AmU||G_ARRAY | |
91e74348 | 685 | Used to indicate list context. See C<GIMME_V>, C<GIMME> and |
954c1994 GS |
686 | L<perlcall>. |
687 | ||
688 | =for apidoc AmU||G_VOID | |
689 | Used to indicate void context. See C<GIMME_V> and L<perlcall>. | |
690 | ||
691 | =for apidoc AmU||G_DISCARD | |
692 | Indicates that arguments returned from a callback should be discarded. See | |
693 | L<perlcall>. | |
694 | ||
695 | =for apidoc AmU||G_EVAL | |
696 | ||
697 | Used to force a Perl C<eval> wrapper around a callback. See | |
698 | L<perlcall>. | |
699 | ||
700 | =for apidoc AmU||G_NOARGS | |
701 | ||
702 | Indicates that no arguments are being sent to a callback. See | |
703 | L<perlcall>. | |
704 | ||
705 | =cut | |
706 | */ | |
707 | ||
a0d0e21e LW |
708 | #define G_SCALAR 0 |
709 | #define G_ARRAY 1 | |
54310121 | 710 | #define G_VOID 128 /* skip this bit when adding flags below */ |
79072805 | 711 | |
864dbfa3 | 712 | /* extra flags for Perl_call_* routines */ |
a0d0e21e LW |
713 | #define G_DISCARD 2 /* Call FREETMPS. */ |
714 | #define G_EVAL 4 /* Assume eval {} around subroutine call. */ | |
715 | #define G_NOARGS 8 /* Don't construct a @_ array. */ | |
54310121 | 716 | #define G_KEEPERR 16 /* Append errors to $@, don't overwrite it */ |
491527d0 | 717 | #define G_NODEBUG 32 /* Disable debugging at toplevel. */ |
968b3946 | 718 | #define G_METHOD 64 /* Calling method. */ |
edb2152a NC |
719 | #define G_FAKINGEVAL 256 /* Faking en eval context for call_sv or |
720 | fold_constants. */ | |
e336de0d | 721 | |
faef0170 HS |
722 | /* flag bits for PL_in_eval */ |
723 | #define EVAL_NULL 0 /* not in an eval */ | |
724 | #define EVAL_INEVAL 1 /* some enclosing scope is an eval */ | |
725 | #define EVAL_WARNONLY 2 /* used by yywarn() when calling yyerror() */ | |
864dbfa3 | 726 | #define EVAL_KEEPERR 4 /* set by Perl_call_sv if G_KEEPERR */ |
6dc8a9e4 | 727 | #define EVAL_INREQUIRE 8 /* The code is being required. */ |
faef0170 | 728 | |
e336de0d GS |
729 | /* Support for switching (stack and block) contexts. |
730 | * This ensures magic doesn't invalidate local stack and cx pointers. | |
731 | */ | |
732 | ||
e788e7d3 GS |
733 | #define PERLSI_UNKNOWN -1 |
734 | #define PERLSI_UNDEF 0 | |
735 | #define PERLSI_MAIN 1 | |
736 | #define PERLSI_MAGIC 2 | |
737 | #define PERLSI_SORT 3 | |
738 | #define PERLSI_SIGNAL 4 | |
739 | #define PERLSI_OVERLOAD 5 | |
740 | #define PERLSI_DESTROY 6 | |
741 | #define PERLSI_WARNHOOK 7 | |
742 | #define PERLSI_DIEHOOK 8 | |
743 | #define PERLSI_REQUIRE 9 | |
e336de0d GS |
744 | |
745 | struct stackinfo { | |
746 | AV * si_stack; /* stack for current runlevel */ | |
747 | PERL_CONTEXT * si_cxstack; /* context stack for runlevel */ | |
748 | I32 si_cxix; /* current context index */ | |
749 | I32 si_cxmax; /* maximum allocated index */ | |
750 | I32 si_type; /* type of runlevel */ | |
751 | struct stackinfo * si_prev; | |
752 | struct stackinfo * si_next; | |
ce2f7c3b | 753 | I32 si_markoff; /* offset where markstack begins for us. |
e336de0d GS |
754 | * currently used only with DEBUGGING, |
755 | * but not #ifdef-ed for bincompat */ | |
756 | }; | |
757 | ||
758 | typedef struct stackinfo PERL_SI; | |
759 | ||
3280af22 NIS |
760 | #define cxstack (PL_curstackinfo->si_cxstack) |
761 | #define cxstack_ix (PL_curstackinfo->si_cxix) | |
762 | #define cxstack_max (PL_curstackinfo->si_cxmax) | |
e336de0d GS |
763 | |
764 | #ifdef DEBUGGING | |
ce2f7c3b GS |
765 | # define SET_MARK_OFFSET \ |
766 | PL_curstackinfo->si_markoff = PL_markstack_ptr - PL_markstack | |
e336de0d | 767 | #else |
ce2f7c3b | 768 | # define SET_MARK_OFFSET NOOP |
e336de0d GS |
769 | #endif |
770 | ||
d3acc0f7 | 771 | #define PUSHSTACKi(type) \ |
e336de0d | 772 | STMT_START { \ |
3280af22 | 773 | PERL_SI *next = PL_curstackinfo->si_next; \ |
e336de0d GS |
774 | if (!next) { \ |
775 | next = new_stackinfo(32, 2048/sizeof(PERL_CONTEXT) - 1); \ | |
3280af22 NIS |
776 | next->si_prev = PL_curstackinfo; \ |
777 | PL_curstackinfo->si_next = next; \ | |
e336de0d GS |
778 | } \ |
779 | next->si_type = type; \ | |
780 | next->si_cxix = -1; \ | |
781 | AvFILLp(next->si_stack) = 0; \ | |
3280af22 NIS |
782 | SWITCHSTACK(PL_curstack,next->si_stack); \ |
783 | PL_curstackinfo = next; \ | |
ce2f7c3b | 784 | SET_MARK_OFFSET; \ |
e336de0d GS |
785 | } STMT_END |
786 | ||
e788e7d3 | 787 | #define PUSHSTACK PUSHSTACKi(PERLSI_UNKNOWN) |
d3acc0f7 | 788 | |
3095d977 GS |
789 | /* POPSTACK works with PL_stack_sp, so it may need to be bracketed by |
790 | * PUTBACK/SPAGAIN to flush/refresh any local SP that may be active */ | |
d3acc0f7 | 791 | #define POPSTACK \ |
e336de0d | 792 | STMT_START { \ |
39644a26 | 793 | dSP; \ |
c4420975 | 794 | PERL_SI * const prev = PL_curstackinfo->si_prev; \ |
e336de0d | 795 | if (!prev) { \ |
bf49b057 | 796 | PerlIO_printf(Perl_error_log, "panic: POPSTACK\n"); \ |
e336de0d GS |
797 | my_exit(1); \ |
798 | } \ | |
3280af22 | 799 | SWITCHSTACK(PL_curstack,prev->si_stack); \ |
e336de0d | 800 | /* don't free prev here, free them all at the END{} */ \ |
3280af22 | 801 | PL_curstackinfo = prev; \ |
e336de0d GS |
802 | } STMT_END |
803 | ||
804 | #define POPSTACK_TO(s) \ | |
805 | STMT_START { \ | |
3280af22 | 806 | while (PL_curstack != s) { \ |
bac4b2ad | 807 | dounwind(-1); \ |
d3acc0f7 | 808 | POPSTACK; \ |
bac4b2ad | 809 | } \ |
e336de0d | 810 | } STMT_END |
923e4eb5 JH |
811 | |
812 | #define IN_PERL_COMPILETIME (PL_curcop == &PL_compiling) | |
813 | #define IN_PERL_RUNTIME (PL_curcop != &PL_compiling) | |
814 | ||
9850bf21 RH |
815 | /* |
816 | =head1 Multicall Functions | |
817 | ||
818 | =for apidoc Ams||dMULTICALL | |
819 | Declare local variables for a multicall. See L<perlcall/Lightweight Callbacks>. | |
820 | ||
821 | =for apidoc Ams||PUSH_MULTICALL | |
822 | Opening bracket for a lightweight callback. | |
823 | See L<perlcall/Lightweight Callbacks>. | |
824 | ||
825 | =for apidoc Ams||MULTICALL | |
826 | Make a lightweight callback. See L<perlcall/Lightweight Callbacks>. | |
827 | ||
828 | =for apidoc Ams||POP_MULTICALL | |
829 | Closing bracket for a lightweight callback. | |
830 | See L<perlcall/Lightweight Callbacks>. | |
831 | ||
832 | =cut | |
833 | */ | |
834 | ||
835 | #define dMULTICALL \ | |
836 | SV **newsp; /* set by POPBLOCK */ \ | |
837 | PERL_CONTEXT *cx; \ | |
82f35e8b | 838 | CV *multicall_cv; \ |
9850bf21 RH |
839 | OP *multicall_cop; \ |
840 | bool multicall_oldcatch; \ | |
841 | U8 hasargs = 0 /* used by PUSHSUB */ | |
842 | ||
82f35e8b | 843 | #define PUSH_MULTICALL(the_cv) \ |
9850bf21 | 844 | STMT_START { \ |
0bcc34c2 AL |
845 | CV * const _nOnclAshIngNamE_ = the_cv; \ |
846 | CV * const cv = _nOnclAshIngNamE_; \ | |
847 | AV * const padlist = CvPADLIST(cv); \ | |
9850bf21 RH |
848 | ENTER; \ |
849 | multicall_oldcatch = CATCH_GET; \ | |
850 | SAVETMPS; SAVEVPTR(PL_op); \ | |
851 | CATCH_SET(TRUE); \ | |
852 | PUSHBLOCK(cx, CXt_SUB|CXp_MULTICALL, PL_stack_sp); \ | |
853 | PUSHSUB(cx); \ | |
854 | if (++CvDEPTH(cv) >= 2) { \ | |
855 | PERL_STACK_OVERFLOW_CHECK(); \ | |
856 | Perl_pad_push(aTHX_ padlist, CvDEPTH(cv)); \ | |
857 | } \ | |
858 | SAVECOMPPAD(); \ | |
859 | PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv)); \ | |
82f35e8b | 860 | multicall_cv = cv; \ |
9850bf21 RH |
861 | multicall_cop = CvSTART(cv); \ |
862 | } STMT_END | |
863 | ||
864 | #define MULTICALL \ | |
865 | STMT_START { \ | |
866 | PL_op = multicall_cop; \ | |
867 | CALLRUNOPS(aTHX); \ | |
868 | } STMT_END | |
869 | ||
870 | #define POP_MULTICALL \ | |
871 | STMT_START { \ | |
82f35e8b RH |
872 | LEAVESUB(multicall_cv); \ |
873 | CvDEPTH(multicall_cv)--; \ | |
9850bf21 RH |
874 | POPBLOCK(cx,PL_curpm); \ |
875 | CATCH_SET(multicall_oldcatch); \ | |
876 | LEAVE; \ | |
877 | } STMT_END | |
b3ca2e83 NC |
878 | |
879 | /* | |
880 | * Local variables: | |
881 | * c-indentation-style: bsd | |
882 | * c-basic-offset: 4 | |
883 | * indent-tabs-mode: t | |
884 | * End: | |
885 | * | |
886 | * ex: set ts=8 sts=4 sw=4 noet: | |
887 | */ |